Agilent Technologies PSA Series User And Programming Manual page 168

Instrument Functions: M - O
Marker
Marker Units
markers - the display shows the value of the Y-axis position of the marker in the
• Normal
current Y-axis units. (See
, , or
• Delta Delta Pair Span Pair
expressed in dB) between two markers. If the Y-axis units are logarithmic (dBm, dBmV,
dBuV) the ratio is express in dB. If the Y-axis units are linear (volts, watts) the ratio is
expressed in percent (where 100% is the same as 0 dB difference). Note that the value
when the Y-axis units are watts is the square of the value when the Y-axis units are
volts. For example, when the percent ratio with Y-axis units in volts is 20% (0.2), the
percent ratio with Y-axis units in watts will be 4% (0.2
value out remotely you have to know whether you are in log (dB) or linear (percent).
Marker functions (
• Marker Noise
with units that are dependent on the function and the Y-axis units. Refer to the
individual function descriptions for more details about the units used. When you read
the value out remotely you have to know what the expected units are.
Remote Command:
:CALCulate:MARKer[1]|2|3|4:MODE POSition|DELTa|BAND|SPAN|OFF
:CALCulate:MARKer[1]|2|3|4:MODE?
Sets or queries the marker control mode (see parameter list above).
:CALCulate:MARKer[1]|2|3|4:X <param>
Sets the marker X position to a specified point on the X axis in the current X-axis units
(frequency or time). If the frequency or time chosen would place the marker off screen, the
marker will be placed at the left or right side of the display, on the trace. This command
will have no effect if the marker is
:CALCulate:MARKer[1]|2|3|4:X?
Queries the marker X position in the current x-axis units. The marker must be
response to be valid.
[:SENSe]:MARKer[1]|2|3|4:X:POSition <param>
Sets the marker X position to a specified point on the X axis in display points (values of 0 to
600, or the current number of points in the sweep). The marker must already be on.
[:SENSe]:MARKer[1]|2|3|4:X:POSition?
Returns the current marker X position in display points.
:CALCulate:MARKer[1]|2|3|4:Y?
Queries the marker Y value or delta in the current y axis units. Can also be used to read
the results of marker functions such as
response to be valid.
168
,
Amplitude Y Axis Units
markers - the display shows the ratio (difference when
and
Band/Intvl Power
.
OFF
Marker Noise
.)
2
= 0.04). When you read the
) - the display shows the values
. The marker must be
for the
ON
for the
ON
Chapter 3